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|Linnaeite Group > Thiospinel Group|
Robinson & Brooker (1952) gave a partial description of an unnamed selenide from Ato Bay (TL2), which according to Harris (1970) was later informally named tyrrellite by Robinson. The name appeared in Hey (1963) and elsewhere without explanation. It was properly confirmed as a new species by Harris (1970), who completed the full description of the mineral on material from Eagle claims (TL1) (Horváth 2003).
Classification of Tyrrellite
|IMA status:||Valid - first described prior to 1959 (pre-IMA) - "Grandfathered"|
|Strunz 8th edition ID:||2/D.01-140|
|Nickel-Strunz 10th (pending) edition ID:||2.DA.05|
2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
D : Metal Sulfides, M: S = 3 :4 and 2:3
A : M:S = 3:4
|Dana 8th edition ID:||18.104.22.168|
2 : SULFIDES
10 : AmBnXp, with (m+n):p = 3:4
|Hey's CIM Ref.:||3.11.20|
3 : Sulphides, Selenides, Tellurides, Arsenides and Bismuthides (except the arsenides, antimonides and bismuthides of Cu, Ag and Au, which are included in Section 1)
11 : Sulphides etc. of Ni
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Type Occurrence of Tyrrellite
|Co-type Localities:||Ato Bay, Beaverlodge Lake, Goldfields District, Beaverlodge Region, Saskatchewan, Canada|
Eagle Claims U-Cu-Se Occurrence, Eagle shaft area, Melville Lake, Goldfields District, Beaverlodge Region, Saskatchewan, Canada
|Year of Discovery:||1952|
Physical Properties of Tyrrellite
|Hardness (Vickers):||VHN100=343 kg/mm2|
|Density (measured):||6.6 g/cm3|
|Density (calculated):||6.59 g/cm3|
Crystallography of Tyrrellite
|Class (H-M):||m3m (4/m 3 2/m) - Hexoctahedral|
|Cell Parameters:||a = 10.005Å|
|Unit Cell Volume:||V 1,001.50 Å³ (Calculated from Unit Cell)|
|X-Ray Powder Diffraction:|
Optical Data of Tyrrellite
Chemical Properties of Tyrrellite
|Simplified for copy/paste:||Cu(Co3+,Ni3+)2Se4|
|Essential elements:||Co, Cu, Se|
|All elements listed in formula:||Co, Cu, Ni, Se|
Relationship of Tyrrellite to other Species
|Member of:||Linnaeite Group > Thiospinel Group|
|Other Members of Group:|
|Related Minerals - Nickel-Strunz Grouping):|
|Related Minerals - Hey's Index Grouping:|
Other Names for Tyrrellite
|Fluorescence in UV light:||Not fluorescent|
|Health Warning:||No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.|
References for Tyrrellite
ROBINSON, S.C. & BROOKER, E.J. (1952): A cobalt - nickel - copper selenide from the Goldfields district, Saskatchewan, Canada. American Mineralogist 37, 542-544.
HEY, M. (1963) Appendix to the Second Edition of an Index of Mineral Species and Varieties Arranged Chemically. British Museum, London, U.K. (6, 128).
HARRIS, D.C. (1970): New data on tyrrellite. Canadian Mineralogist 10, 731-736.
Internet Links for Tyrrellite
Localities for Tyrrellite
The map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.
(TL) indicates type locality. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.